To be noisy or abuzz; to be in a state of unrest or commotion. Used for places becoming restless (crowds, markets) or for inward unease.
ニュースが流れるとスタジオが一瞬ざわついた。
When the news broke, the studio became briefly abuzz.
試験の結果が気になって、心がざわついて眠れなかった。
Worrying about the exam results made me restless and I couldn't sleep.
市場の前は朝から買い物客でざわついている。
The area in front of the market has been bustling with shoppers since morning.